Raindrop Sensor HL-01 is a rain detection module with two parts.

first part is a printed circuit board that has a network of copper paths.

The second part is a converts analog output to digital output. The sensitivity of the sensor is adjusted using the potentiometer on the board.

Production: 

– High quality FR-04 dual sided material, ultra area 5.0 x 4.0cm. Nickel-plated surface, with antioxidant, electrical conductivity, and superior lifetime performance

– Comparator output, clear signal, and nice waves, powerful driver over 15mA

– Equipped with potentiometer to adjust the sensitivity

– Working voltage: 3.3V~5V

– Output method: Digital switch output (0 / 1) and analog AO voltage output

– Easy installation with fixed screw hole

– PCB size: 3.2cm x 1.4cm

– Uses wide voltage and LM393 comparator 

Features: 

– When connected to a 5V supply power lights, no water droplets on sensor board , DO output is high; Switch lights off, drop a drop of water, DO output is low, the switch indicator light.

– Clean the water droplets, returned to output high state.

– AO analog output connects to the microcontroller AD port to detect drops in the above rainfall size.

– DO TTL digital outputs connects to the microcontroller to detect whether there is rain.

Connection: 

VCC: Power positive (3~5V)

GND: Power negative 

DO: TTL switch signal output 

AO: Analog signal output